I don't mean to be argumentative...but you really need a large BYRON HEAD engine for your BYRON plane. That's why they make the large head engines.
And get a remote needle valve. The vast majority of DF flyers would agree. It can save your plane and save your engine. The cost of a remote needle is a lot less than a burnt up engine, or a new airplane. The Cook one is good, but I think the BVM one is better, just easier to use.